Patients were compared to 44 healthy volunteers (18 men, 26 women), who were recruited from the New York metropolitan area for a payment of US$15/h, and who were without current or past psychopathology based on a standard screening interview (SCID-NP; First et al., 1996). Although there were almost twice as many male patients than healthy men, the groups’ gender ratios were only marginally different (Table 1). Whereas patients had significantly less education than control participants, the available verbal IQ data (WAIS) suggested that the patients’ verbal skills were well within normal range. Although patients were on average somewhat (i.e., less than 3 years) older than controls, the groups’ age range was fairly comparable and all electrophysiologic findings reported were not affected by this variable (see below).
